 window.onload = function(){
 	var oBtn=document.getElementById('Btn_clear');
 	var oText_a=document.getElementById('account');
 	var oText_p=document.getElementById('password');
 	var oText_c=document.getElementById('code');
 	
 	oBtn.onclick = function(){
 		oText_a.value='';
 		oText_p.value='';
 		oText_c.value='';
 	};	
 	
 };